(19)
(11) EP 0 459 434 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.05.1992 Bulletin 1992/20

(43) Date of publication A2:
04.12.1991 Bulletin 1991/49

(21) Application number: 91108767.4

(22) Date of filing: 29.05.1991
(51) International Patent Classification (IPC)5: F04B 49/00, F04B 49/02
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR IT LI LU NL SE

(30) Priority: 01.06.1990 AR 317005

(71) Applicant: Valdes, Osvaldo
Las Condes, Santiago (CL)

(72) Inventor:
  • Valdes, Osvaldo
    Las Condes, Santiago (CL)

(74) Representative: Saconney, Piero et al
c/o JACOBACCI & PERANI S.p.A. Corso Regio Parco, 27
10152 Torino
10152 Torino (IT)


(56) References cited: : 
   
       


    (54) Hydropneumatic constant pressure device for automatic control of the operation and stopping of electrical motorpumps


    (57) A hydropneumatic apparatus controls the operation of an electric motorpump which supplies pressurized water or another liquid, according to a variable consumption demand. The apparatus comprises a flow sensor device which detects the variation in demand for consumption. The flow sensor device has a driving piston (21) located within a pressure transfer chamber (31) which is communicated to a pressure switch (35) electrically connected to the motorpump. The pressure transfer chamber (31) is also permanently communicated to the water pressure. A hydropneumatic tank (50) is provided with a transfer device which permits entry of water to the tank (50), but limits outflow therefrom.






    Search report